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svlad2 [7]
3 years ago
5

Sharina simplified the expression 3(2x – 6 – x + 1)2 – 2 + 4x. In Step 1 she simplified within the parentheses. In Step 2 she ex

panded the exponent. Which is a possible next step? Simplify the expression by adding and subtracting from left to right. Combine like terms within the parentheses. Combine all x-terms. Distribute the 3 to each term in the parentheses by multiplying.
Mathematics
1 answer:
stiks02 [169]3 years ago
7 0
3x^2 - 42x + 147 - 2 + 4x
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Let X and Y be the following sets: X={0,12,23} Y={3,12,15} Which of the following is the set X \ Y?
Digiron [165]

Answer:

Step-by-step explanation:

X={0,12,23}

Y={3,12,15}  

X \ Y = { 0 , 23}

X/Y means the element should be only in X. We have remove the element in X if it is in Y

In this 0 and 23 is only in X

12 is X and Y. So it wont come in X/Y

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Akimi4 [234]
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3 years ago
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What is the value of 2x to the third power+4x to the second power 3x to the second power-6x when x=3?
jek_recluse [69]
Hi! So to solve for these, all you have to do is keep PEDMAS in mind. For example, for 2x^3 (Just a fancy way of writing "to the third power") first plug in 3: 2(3)^3 and take it to the third power because E (exponent) comes before M (multiplication) in PEDMAS. You should get 2(27) which then equals 54. Hope this helps:)
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3 years ago
Express cos(27pi/8) as a trigonometric function of an angle in Quadrant I.
Kryger [21]

Answer:

The equivalent trigonometric ratio in Quadrant I is -\cos (\frac{3\pi}{8})

Step-by-step explanation:

The terminal side of \frac{27\pi}{8} is in the 3rd quadrant.

The principal angle is \frac{3\pi}{8}

In other words, the terminal side of \frac{27\pi}{8}  makes an acute angle of \frac{3\pi}{8} radian with the positive x-axis. Acute angles are in the first quadrant.

Since the cosine ratio is negative in the 3rd quadrant,

\cos (\frac{27\pi}{8})=-\cos (\frac{3\pi}{8})

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3 years ago
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